Concrete paving-slab



R. S. CADE.

CONCRETE PAvmG SLAB.

APPLICATION FILED APR. I5; I9I9. 1,371,856.. Patented Mm'. 15, 1921..

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terials and has Ifor its object the UNITED STATES ROBERT S. CADE, OFCANTON, OHIO.

CONCRETE PAVING-SLAB.

Specification of Letters Patent.

Patented Mar@ 15, 1921.

Application illed April 15, 1919. Seria1`No. 290,178.

v To all whom t may concern.'

Be it knownthat I, RoBnRr- S. CADE, a citizen of the yUnited States,residin at Canton, in the county of Starke and tate of Ohio, haveinvented new and useful Improvements in Concrete Paving-Slabs, of whichthe 'following is a specification.

This invention relates to building marovision of a concrete slab adaptedfor use in paving roadways, cellars, porch iioors, and the like, theslab having its ends so formed that when a plurality of slabs arearranged in end to end relation the meetin ends will be interengaged andpositivelyf ocked against relative upward or downward displacement ofany end whereby a very strong joint will be provided which is incapableof dislocation.

An important object is the provision of a slab of this character, theends of which are so constructed that when the ends ciadjacent slabs areinterengaged the joints therebetween will permit of the necessaryexpansion and contraction of the slabs under the influence of heat orcold so that danger of cracking the slabs will be avoided.

Another object is the provision of a slab vof this character which willbe very simple and inexpensive in manufacture, highly yeificient in use,durable in service, and a general improvement in the art.

With the above and other objects and advantages in view, the inventionconsists in the details of construction to be hereinafter more fullydescribed and claimed, and illustrated in the accompanying drawing,- inwhich-.

The gure is a longitudinal sectional view through a plurality of blocksor s labs constructed in accordance with my invention and arranged ininterengagement.

Referring more particularly to the drawing, the numeral 10 designatesthe body of the slab which may be of any desired dia mansions and whichis formed of any preferred mixture of concrete or the like and which mayor may not be, provided with longitudinal reinforcing members 11 whichmay be fluted iron, brass,A wire netting, or in fact any of the standarddevices used for this purpose.

' At one end the slab is formed with a downward and outward extension 12and this end will, for the sake of clearness, be

hereinafter designated as the female memvwithin the recess 13 and underthe overhang 15, with the end of the slab proper en aging against theshoulder 14 of the next a jacent slab. The end of the slab provided withthe, A

extension 16 will be hereinaterreferred to as the male member of thejoint between the slabs.

1n assembling a plurality of slabs in building a roadway or `floor, theextension 16 constituting the male member is engaged withinlthe recess13 of the next adjacent slab with its extremity engaging beneath theoverhang 15, as will be obvious from an inspection of the drawing. Thisengagement may be ciiected by tilting the adjacent ends of two slabsrelatively or it may be effected b'y slidlng one slab laterally withrespect to the next adjacent slab. When the slabs are connected by theabove described joint, it will be seen that relative upward displacementof either of the meeting ends of successive slabs will be prevented byengagement of the extension 16 beneath the overhang) 15. The usualmetallic edge plates 17 may e provided at the upper edges of the ends ofthe slabs for making the proper joint.

From the foregoing description and a study of the drawing it will beapparent that I have thus provided an extremely simple and inexpensivepaving yslab which is so constructed that a plurality of slabs may beinterengaged in end to end relation with simplicity and ease and withthe result that a joint will be provided which will be very secure andstrong inasmuch as displacement of the meeting ends upwardly ordownwardly with respect -to each other will be prevented.

Having thus described my invention, claim :-v

A concrete slab comprising an elongated body having its ends formed assquare shoulders, a downward and outward extension formed at one end ofsaid body and having its upper surface .lying in the same plane as thelower surface of the body of the slab, the upper surface of saidextension being recessed and said recess extending beneath the adjacentshoulder whereby to provide an overhang, and an extensioni'ormed o n theother end of the slab and extending from and beyond the lower sidethereof, said last named extension being of a size and shape whereby toconformingly engage within the recess in the first named extenslon onthe next adjacent slab, and a tongue extending from said second named 16extenslon and enaging beneath the overhang at the end o the nextadjacent slab.

In testimony whereof I aix my signature.

.ROBERT S. CADE.

